This product has the ability to apply and verify signatures and timestamps.
Here, we will explain the overview of these features.
Applying and Verifying
What is “Applying” a Signature & Timestamp
Applying refers to the act of electronically signing or timestamping a digital document (PDF file in this product).
What is “Verifying” a Signature & Timestamp
Verifying refers to the process of checking the integrity of the signature or timestamp applied to a digital document.
Digital Signature
A Digital Signature signature is a technology used to prove that a digital document (PDF file in this product) was created or approved by a specific person or organization, similar to signing a paper document.
In this product, it is possible to apply a digital signature signature with or without a signature timestamp.
Digital Signature Signature without Signature Timestamp |
- This guarantees that the signer is the person themselves and that the digital Signature document has not been tampered with after the application through the use of a digital certificate.
- Since it does not include a timestamp, it can be applied in an offline environment.
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Digital Signature Signature with Signature Timestamp |
- This guarantees that the signer is the person themselves , that the Digital Signature document existed at the time of application , and that the electronic document has not been tampered with after the application all at once.
- Since it includes a timestamp, it can only be applied in an online environment.
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To keep a digital Signature signature valid for a long time, you need information to prove that the certificate used for the signature was valid at the time of signing (verification information) and a timestamp.
However, these can only be added in an online environment connected to the Internet.
If you have applied a signature without either or both of the verification information and timestamp to a PDF file that needs to be stored for a long time, it is recommended to perform the following after transitioning to an online environment:
- Addition of verification information
- Addition of document timestamp, or addition of signature with signature timestamp
Timestamp
A timestamp is a technology used to provide proof of date and time to a digital document.
By applying a timestamp with a recorded date and time, you can guarantee that the digital document existed at that time and that the document has not been tampered with after the application.
This product can apply several types of timestamps, but all require an online environment to apply.
Signature Timestamp |
- A timestamp applied in the form included in the signature.
- It is applied to the signature value in the signature data.
- A license for “AMANO Time Stamp Service 3161” or “SEIKO Time Stamp Service” is required.
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Document Timestamp |
- A timestamp applied individually.
- It is applied to the entire electronic document.
- It can be applied from [TimeStamp] in the “Signature/TimeStamp” group of the [Signature/Seal] menu.
- A license for “AMANO Time Stamp Service 3161” or “SEIKO Time Stamp Service” is required.
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Archive Timestamp |
- A document timestamp applied for the purpose of long-term guarantee and storage of a digital document with a signature or timestamp.
It performs verification of the signature or timestamp applied to the digital document, and applies a document timestamp along with that verification information.
- It is applied to the entire electronic document.
- It can be applied from [Archive] in the [Signature/Seal] menu.
- A license for “AMANO Time Stamp Service 3161” or “SEIKO Time Stamp Service” is required.
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AMANO Timestamp |
- A timestamp applied individually.
- It is applied to the entire electronic document.
- It can be applied from [TimeStamp] in the “AMANO TimeStamp” group of the [Signature/Seal] menu.
- A license for “AMANO Time Stamp Service 3161” is required.
- You can use a unique appearance for the AMANO timestamp.
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